A IRTRONI C D2/D4
D IAG NOSTIC AND REPAIR MANU A L
A WORLD OF COMFORT
Table of Contents
REVISION LEVEL A - 12/09/13
Chapter
1
2
3
4
5
6
7
Content
Page
System Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Diagnostic Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Maintenance / Troubleshooting & Repair . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Parts Breakdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Fuel Filter / Fuel Pump Angle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
PLEASE NOTE! The EW14 Warranty Process requires Edith extraction printouts to record codes before proceeding with repairs – and after the repair
steps listed in this manual are completed . For your warranty claim to be paid you must document the Complaint, Cause and Correction steps in your
warranty claim write-up .
CAUTION: Indicates that personal injury or damage to equipment may occur unless specific guidelines are followed.
DANGER: Indicates that serious or fatal injury may result if specific guidelines are not followed.
This document aims to support service technicians and end users in North America. This does not replace documentation produced by J. Eberspächer.
The installation instructions and standards described in this document are NOT APPLICABLE TO MARINE INSTALLATIONS.
Please consult a certified Espar Marine dealer for marine installation.
This publication was correct at the time of going to print. However, Espar Inc. has a policy of continuous improvement and reserves the right to amend any
specifications without prior notice.
2
1 System Overview
REVISION LEVEL A - 12/09/13
SYSTEM OVERVIEW
The Espar Airtronic D2 heater is designed to lower idling by providing an
alternative in cab heat solution
SYSTEM OPERATION
1. The operation turns on the device via either the Mini, Digi or Digi-Max Controller.
a. The Mini-Controller has a simple rheostat design for cab temperature
control (Figure 1).
b. The Digi/Digi-Max Controller are digital devices that controls the cab
temperature and also acts as a diagnostic device (Figure 2 & 3).
PLEASE NOTE! If the unit is equipped with a Digi-Controller and the
display is showing H, the interior temp of the unit is too high to allow the
Espar unit to operate. If the display is showing L, the unit will work but the
temp is too cold to show the correct temp on the display.
Figure 1
Figure 2
Figure 3
2. When the heater is first started the following events take place:
a. The unit runs through a 3 second diagnostic check.
b. The fan and glow pin come on.
c. After 60 seconds the fuel pump starts pumping fuel.
d. If the unit doesn’t fire within 2 1/2 minutes:
I. The unit will then stop the fuel pump and pause for 60 seconds.
II. The unit will then attempt a second start.
e. If the unit doesn’t fire after the second attempt, a code 52 will be set.
Refer to the fault code section of this document for proper troubleshooting.
PLEASE NOTE! Times are approximate, it is more important to understand
there are 2 attempts and the process can takes some time. After the second
failed attempt, the heater fan motor will remain on for up to three minutes
which is normal and part of the logic of the heater. The unit must be allowed
time to run through its cycle. If there is an issue it will trip a code.
3. Inside the unit
a. The fan provides air flow through the combustion chamber and the
ventilation hole.
b. The glow pin heats the atomizer chamber to preheat in preparation for fuel.
c. Fuel first enters below the ventilation hole.
d. It is then atomized and ignites.
e. The flame burns through the combustion chamber.
f. The flame sensor recognizes a temperature rise and then shuts off the
glow pin.
g. The ECU measures the cab temperature via the return air temperature
sensor in correlation with the set point (Figure 4).
h. Units utilizing the Digi/Digi-Max Controller do not utilize the return air
temp sensor but instead use the remote air temperature sensor on the
“Controller” (Figure 2 & 3 – page 3).
i. The unit switches between boost, high, medium, low and standby.
I. When it first ignites it is always in boost.
II. Mode is controlled via fuel pump frequency and fan speed.
3
1 System Overview
REVISION LEVEL A - 12/09/13
SYSTEM OVERVIEW
4. Difference by controller operation
a. When operating in standby mode with a Mini-Controller the fan will
continue to run in order to maintain airflow across the return air
temperature sensor.
b. When operating in standby mode with a Digi/Digi-Max Controller the
fan will shut down as air flow is not required.
PLEASE NOTE!
Any component replacement will require the serial number of the espar unit
be entered in order to charge the component to the work order. The seial
number is located on the side of the Espar unit (Figure 5).
Serial number
Figure 4
Figure 5
Direction of air flow
Ventilation hole
Glow pin
Flame sensor
Combustion chamber
Fuel pump
Figure 6
4
2 Diagnostic Devices
REVISION LEVEL A - 12/09/13
MULTIPLE DIAGNOSTIC DEVICES ARE AVAILABLE AS OUTLINED BELOW:
This manual is designed to be used with the Airtronic D2/D4. Please reference
the data tag on your heater to verify which heater model you have. The
Airtronic D2/D4 can utilize any of the fault code readers listed here.
1. EDITH PC BASED DIAGNOSTICS – “PREFERRED”:
The ability to print out an ECU extraction is only available using EDITH PC
diagnostics, and is a requirement for taking advantage of the EW14 express
warranty protocols. Full product testing capability including remote running
of system components without removal of the heater, can be utilized for rapid
fuel system priming.
EDITH
Figure 7
2. DIGI-DIAGNOSTIC TOOL
Inexpensive - basic code viewing & clearing functions.
While there are other fault code readers available, in this manual we are going
to focus on only two methods – Edith PC diagnostics and the Digi-Controller
(controller installed with the heater) / Digi-Diagnostic Tool (identical handheld
tool).
Figure 8
5
2 Diagnostic Devices
REVISION LEVEL A - 12/09/13
EDITH PC DIAGNOSTICS “PREFERRED”
Figure 9
6
2 Diagnostic Devices
REVISION LEVEL A - 12/09/13
2. DIGI-DIAGNOSTIC TOOL/CONTROLLER
1. First turn the controller on by pressing and releasing the instant ON /
OFF key.
2. To review fault codes press and hold the instant ON/OFF until the
display shows “da”.
a. Codes will be displayed in the following manner:
1. F0 will display first followed by the code number.
2. This is the active code and is the code that should be
repaired first.
a. Subsequent codes will be display with F1, F2, F3 etc.
followed by the code number.
3. The “F1” simply indicates this is the first or most recent historical code
and they go in order.
4. If there is not driver complaint, no active code, and the system is
operating no repairs are needed codes should be cleared.
5. To clear fault codes:
a. While in diagnostic mode push and hold both arrow buttons until
“EE” is displayed on the screen.
b. To exit diagnostic mode hit the ON / OFF button.
c. To shut the unit down hit the ON / OFF button again.
PLEASE NOTE!
ALWAYS document codes prior to clearing them - EVEN if no repairs are made.
Figure 10
PLEASE NOTE!
Prior to making repairs ALWAYS complete a visual inspection / operation
inspection and note findings in the work performed section of your repair
order.
PLEASE NOTE!
Any component replacement will require the serial number of the espar unit
be entered in order to charge the component to the work order.
7
3 Visual Inspection
REVISION LEVEL A - 12/09/13
VISUAL INSPECTION
1. Complete a visual inspection using the following instructions:
a. Fuel Pump angle (Figure 11 and 12): Between 15 and 35 degrees- Inlet is low side, outlet is high side.
i. Yes
______
ii. No
______
iii. If no it will need to be reset to proper angle.
PLEASE NOTE! It is very important that the pump angle is not reversed. When checking angle ensure that the inlet (side the fuel is drawn into the pump) is
the low side and the outlet (side fuel exits the pump) is the high side. It is very important that the pump angle is not reversed (see figure 12 for proper mounting).
Figure 11
Figure 12
Permissible
pref
erab
le
erab
le
pref
not permissible
not permissible
Fuel Metering Pump
Figure 9
b. Combustion Exhaust (flexible pipe only) - 1.5 to 2.5 inch extension past rear of cab?
i. Yes
_____
ii. No
_____
iii. If no, exhaust will need to be rerouted.
c. Combustion Exhaust (Flexible pipe only) - No Kinks and not crushed.
i. Yes
_____
ii. No
_____
iii. If yes, exhaust will require repair.
d. Combustion Exhaust (Flexible pipe only) - Bent facing the ground at least 45 degree angle?
I. Yes
_____
II. No
_____
III. If no, exhaust will need to be adjusted.
e. Combustion exhaust (flexible pipe only) - Has low hanging areas.
i. Yes
_____
ii. No
_____
iii. If yes, eliminate the droop or drill a 1/8th inch condensation drain.
f. Airflow intake (Figure 13 and 14) and exhaust free of obstruction or damaged venting.
i. Yes
_____
ii. No
_____
iii. If no, repair as needed.
PLEASE NOTE!
If the unit is equipped with a Digi-Controller and the display is showing H, the interior temp of the unit is too high to allow the Espar unit to operate. If the display
is showing L, the unit will work but the temp is too cold to show the correct temp on the display.
2. Verify operation; if unit runs properly:
a. Record any historic codes in the work performed section, clear them and complete the job.
b. If the unit does not operate properly continue below.
3. Using either the Digi-Controller/Diagnostic Tool or Edith, check for fault codes and utilize the troubleshooting steps listed.
8
3 Visual Inspection
REVISION LEVEL A - 12/09/13
PLEASE NOTE!
Return air must be clear from obstructions. If the carpet is too close, cut away from the inlet of the Espar heater to allow for more clearance. Outlet air must
be clear from obstructions.
Return/inlet air must be
clear from obstructions
Outlet air must be
clear from obstructions
Return/inlet air must be
clear from obstructions
Figure 13
Figure 14
9
3 Visual Inspection
REVISION LEVEL A - 12/09/13
TYPICAL NON-WARRANTABLE REPAIRS
1. FUEL FILTER
a. The fuel filter can be found on the inlet side of the fuel pump, see page 32.
If this filter is plugged or partially plugged it can cause a no-start to your
heater. The filter can be serviced by using a backing wrench and turning
the inlet cap off the pump. Then use a small pick to pull the filter out to
be replaced.
b. This filter may cause the heater to smoke during start-up and smoke
during operation.
c. This filter can cause your heater to over fuel due to repetitive start attempts.
d. Common codes associated with a fuel filter: 50 – 56.
2. ATOMIZER SCREEN
a. This screen surrounds the glow pin and is found when the glow pin is removed
3. OVERHEAT AND ASSOCIATED FAILURES (Code 12,14 &15) are normally
non-warrantable failures
4. PLUGGED OR RESTRICTED COMBUSTION INTAKE AND/OR EXHAUST PIPING
5. CARBONED BURNER CHAMBER – these are non-warrantable unless caused
by a primary failed part covered under a warrantable failure situation.
a. Caused by a restriction of intake or exhaust.
b. Caused by improper angle of fuel pump, pump must be 15 – 35 degree
angle up with the outlet / harness connection being on the high side.
c. Fuel system that has had improper amount of additives injected into the tank.
d. Fuel system with any kind of oil being used in the fuel.
e. Short cycling caused by improper application or electrical power
connections.
6. MODIFIED PARTS DURING REMOVAL OR REPAIR WHILE UNDER WARRANTY
Any place where the integrity of the part has been compromised during the
repair will not be covered under warranty. If any part must be modified to
remove or service - cut wires, broken housings, damaged parts – or a harness
or a connector must be repaired in any way, the Espar Warranty Department
must be contacted and a WA# first obtained. 1-800-387-4800
10
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
IF THERE IS NO COMMUNICATION Fault reader displaying - - - (dash dash dash) or non-functional Espar unit without fault codes
1 . Check units open circuit voltage at the batteries.
2 . If the voltage is below 12.6 (Flooded cell) or below 12.8 (AGM) charge the batteries to a minimum of 12.4 volts (must be above the system LVD setting)
following your company’s standard practices and restart troubleshooting.
a. Otherwise continue below.
3 . Connect Diagnostic Interface adapter (Figure 15).
4 . Using the “Y” adapter and multi-meter:
a. Perform a continuity test to verify ground on the brown wire of 0 ohms.
b. Perform a voltage test to verify battery power between the red wire and the brown wire.
I. If voltage is below 10.5 volts troubleshoot the tractor’s wiring utilizing the manufacturer’s documentation –
II. Check for harness voltage drop to the heater.
c. Perform a test to verify continuity to the diagnostic reader at blue wire-white tracer at the white connector and blue wire-yellow tracer on the
Espar heater.
I. If wires are damaged repair wires.
II. Always use heat shrink, solder or connectors with heat shrink tubing when making wiring repairs.
White diagnostic plug
Connection to the heater
side of the harness
Connection to the truck
side of the harness
Figure 15
5 . If the problem persists connect the test harness (Figure 15) and wire the Espar directly to the batteries.
a. Plug the 8 pin adapter test harness in series with the Espar harness at the heater.
6 . Use a known good battery (12 volt min.) and supply external power using the white connector plug (heavy red wire=power, heavy brown wire=ground).
7 . If the problem persists, replace the control unit (ECU).
11
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
FAULT CODE / TROUBLESHOOTING
PLEASE NOTE!
EW13 Warranty Process requires an Edith extraction printout to record codes before proceeding. Remember to carefully document the Complaint – Cause and
Correction.
000 - NORMAL OPERATION
1. No Repairs needed.
010 - OVER-VOLTAGE
1. System maximum voltage is 16 volts.
2. The possible causes of this code are (non-warranty).
a. A battery charger in boost mode.
b. Alternator overcharging.
3. Clear the code repair as needed
011 - UNDER VOLTAGE SHUT DOWN
1.
2.
3.
4.
5.
6.
System minimum voltage is 10.5 volts.
Verify battery voltage.
Install the Y interface adapter.
Connect the multi-meter to the red and brown wires and set to volts DC.
Record the voltage
If the voltage is less than 12.6 (flooded cell) 12.8 (AGM) connect the battery charger and log off the job until the batteries are fully charged, otherwise
continue below. (See note on page 11)
7. Turn on the unit while watching the multi-meter.
8. If the voltage remains above 10.5 clear the code, no repairs are needed, otherwise continue below.
9. Troubleshoot the tractors wiring harness utilizing the factory manuals – check for voltage drop to the heater.
10.Clear codes when repaired.
012 - OVERHEAT AT OVERHEATING SENSOR
1.
2.
3.
4.
5.
6.
7.
8.
Sensor has detected excessive temperatures.
Using shop air, blow out the heat exchanger and airflow ducting including the heating air intake.
Check airflow ensuring the ducting is free from obstructions especially the bunk inlet and outlet.
Remove the sensor, check connections, wiring and reinstall.
If the wiring is damaged or connection is corroded, replace the sensor, otherwise continue below.
Clear code and run unit.
If code returns replace the sensor.
Clear code and run unit ensuring issue is resolved.
013 - OVERHEAT AT FLAME SENSOR
1. Flame sensor detects excessive temperature at heat exchanger.
Using shop air, blow out the heat exchanger and airflow ducting including the intake.
2. Check airflow ensuring the ducting is free from obstructions especially the bunk inlet and outlet.
3. Remove the sensor, check connections, wiring and reinstall.
4. If the wiring is damaged or connection is corroded, replace the sensor, otherwise continue below.
5. Check fuel pump angle and correct if needed.
A. If correction was needed, clear the fault and run unit.
6. If fault code doesn’t return complete the job, otherwise continue below.
7. Measure fuel quantity.
a. Disconnect the fuel line from heater
b. Turn the unit on (remember 60 second delay prior to pump activation)
c. Place the fuel line into the graduated cylinder and allow to run through a first start attempt.
d. Once fuel pump stops running from first start attempt turn the unit off
e. Measured fuel must be between 3.5 to 4.3 milliliters. If the reading is high and the pump angle is verified correct, replace the pump, clear the codes,
run the unit, otherwise skip to step 16.
8. If fault code doesn’t return complete the job otherwise continue below.
9. Replace the sensor
12
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
014 - TEMPERATURE DIFFERENCE BETWEEN FLAME SENSOR AND OVERHEAT
SENSOR TO LARGE
1. Using shop air, blow out the heat exchanger and airflow ducting including the intake.
2. Check airflow ensuring the ducting is free from obstructions especially the bunk inlet and outlet
3. Remove the sensor, check connections, wire and reinstall.
4. If the wiring is damaged or connection is corroded, replace the sensor, otherwise continue below.
5. Check fuel pump angle and correct if needed.
6. If correction was needed, clear the fault and run unit.
7. If fault code doesn’t return complete the job, otherwise continue below.
8. Measure fuel quantity.
a. Disconnect the fuel line from heater.
b. Turn the unit on (remember 60 second delay prior to pump activation).
c. Place the fuel line into the graduated cylinder and allow to run through a first start attempt.
d. Once fuel pump stops running from first start attempt turn the unit off.
e. Measured fuel must be between 3.5 to 4.3 milliliters.
9. If the reading is high and the pump angle is verified correct, replace the pump, clear the codes, and run the unit.
10.If the reading is low, and the pump angle is verified correct, replace the inlet filter and retest
11.If fault code doesn’t return complete the job otherwise continue below.
12.Replace the sensor.
015 - OVERHEAT WITH EXCESSIVE TEMPERATURES
1. Sensor has detected excessive temperatures.
2. This code indicates that Code 017 was set and the unit was restarted.
3. This code indicates that the heaters has been overheated repeatedly consecutive times.
4. Unlock control unit by reviewing all codes.
a. Document all codes.
b. Clear codes (once codes are cleared the lockout will be cleared)
5. Using shop air, blow out the heat exchanger and airflow ducting including the intake.
6. Check airflow ensuring the ducting is free from obstructions especially the bunk inlet and outlet
7. Remove the sensor, check connections, wiring and reinstall.
8. If the wiring is damaged or connection is corroded, replace the sensor, otherwise continue below.
9. Run unit.
10.If Code (either 015 or 017) returns replace the sensor.
11.Clear code and run unit.
12.If code returns reinstall original sensor and replace control unit.
13.Run unit ensuring issue is resolved.
016 - OVERHEAT WITH EXCESSIVE TEMPERATURE
1. This code is set when excess temperature is seen at the overheat sensor.
2. See Code 015.
019 - GLOW PIN POWER CONSUMED BY GLOW PIN IS TOO LOW
1. Unplug the glow pin.
2. Inspect the wire and plug condition; if damaged replace the glow pin, otherwise plug back in.
PLEASE NOTE!
Take care when working with the glow pin - damaged wires or broken glow pins are not a warrantable failure.
Do not twist the wiring during removal. See Basic Repair Analysis Guide / Non-Genuine – glow pins failing under warranty must be returned
3.
4.
5.
6.
Clear codes and run unit.
If code returns replace the glow pin.
Clear codes and run unit.
If code returns replace control unit and reinstalled the removed glow pin.
020 - OPEN CIRCUIT - GLOW PIN (BE CAREFUL NOT TO PULL WIRES OFF GLOW PIN DURING REMOVAL)
1. Inspect glow pin leads for continuity, replace if necessary
2. Check for corrosion in terminals (maintenance)
021 - SHORT CIRCUIT - GLOW PIN (BE CAREFUL NOT TO PULL WIRES OFF GLOW PIN DURING REMOVAL)
1. Inspect glow pin leads for continuity, replace if necessary.
2. Check for corrosion in terminals (maintenance).
13
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
025 - DIAGNOSTICS CABLE BLUE/WHITE - SHORT CIRCUIT
1. Refer to “No Communication”
031 - BLOWER MOTOR INTERRUPTED
1.
2.
3.
4.
Visually inspect air inlet for scratches on impeller. If the fan has visable rub marks, locate cause and correct, thisis not a warrantable failure)
Run unit and listen for rubbing.
Turn blower by hand checking for hard spots.
If any rubbing, scratches, or binding is found resolve the issue:
a. Possible causes:
i. Physical obstruction
ii. Ducting clamp over-torqued
iii. Floor mat or debris under heater when mounted
5. If a hard spot is noted and no intake issue are found remove blower motor and inspect the combustion fan and replace the whole assemble if necessary.
a. A warped combustion fan is caused by short cycling and a power interruption while running.
032 - BLOWER MOTOR SHORT CIRCUIT
1.
2.
3.
4.
Install test ECU
Clear codes and run unit.
If problem is resolved leave new control unit in the Espar.
If problem is not resolved replace blower, reinstall the previos control unit and restart the troubleshooting.
033 - Blower motor speed failure .
1. Motor speed varies from specification by more than 10% for longer than 30 seconds.
2. Inspect the control unit ensuring it is secure.
3. Fan speed is measured from a small magnet located on the fan wheel and the ECU itself.
4. A loose ECU will cause inaccurate readings.
5. If the ECU is loose, tighten the screw.
6. If the screw is stripped install a larger screw.
7. Clear codes and run unit.
8. If code persists continue below otherwise clear historic codes and complete the job.
9. Check heating air intake for obstructions ensuring the blower turns freely.
10. See steps for Code 31
11. Clear codes and run unit.
12. If problem persists install test control unit.
13. Clear codes and run unit.
14. If problem is resolved leave new control unit in the Espar.
15. If problem is not resolved replace blower, reinstall the previos control unit and restart the troubleshooting.
034 - Blower motor outlet (+) short circuit after B+ (battery voltage) .
1. Inspecting wiring from blower motor to control unit.
2. If damaged replace blower otherwise continue below
3. Install test control unit.
4. Clear codes and run unit.
5. If problem is resolved leave new control unit in the Espar.
6. If problem is not resolved replace blower, reinstall the previos control unit and restart the troubleshooting.
047 - SHORT CIRCUIT OR OVERLOAD - FUEL METERING PUMP (FMP)
1.
2.
3.
4.
5.
6.
7.
14
Fuel pump positive wire (green w/red) is shorted to chassis ground.
Inspect wiring for damage, check continuity from 16 pin to fuel pump plug and repair using a heat shrink solder butt connector as needed.
If not damaged continue below.
Unplug the fuel pump and power up unit.
If fault Code 48 is displayed fuel pump is defective.
If fault Code 48 is not displayed recheck wiring.
If still not resolved install test ECU.
If problem is resolved leave test unit in, clear codes and run unit.
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
048 - OPEN CIRCUIT - FUEL METERING PUMP (FMP)
Disconnect connector from fuel pump and measure resistance value of fuel pump see values, pg. 20. If resistance values are O.K., then reconnect cable harness
to the fuel pump.
1. Check fuel pump electrical connector.
a. Pins of female plug end can become spread.
b. Re-crimp if needed.
c. Clear code and run unit.
d. If problem persists continue below.
2. Inspect the wiring for damage, check continuity from the 8 pin housing for an external FMP, and 14 pin housing for an internal FMP.
050 - TOO MANY NO START ATTEMPTS - (LOCKOUT)
PLEASE NOTE!
This is normally not a warrantable failure.
1. Document and clear fault codes.
2. Restart troubleshooting.
i. Reference Code 52.
051 - FAULTY FLAME RECOGNITION
1. Document codes, clear codes, and run unit.
PLEASE NOTE!
This code is cause from a hard shutdown (power cut off) which prevents a cool down. If upon next start the sensed temperature is excessive the unit will
run a cool down cycle. If the sensed temperature doesn’t fall enough a Code 051 is set. This can be a loose power wire or using the master cutoff while
the unit is running.
2. If problem persists install test flame sensor.
3. If problem is resolved leave sensor in, clear codes, and run unit.
Also refer to Code 52 for no-start situations.
052 - NO START SAFETY TIME EXCEEDED
1. No flame detected on start attempt but unit diagnostics are unable to detect a fault.
2. Check exhaust and combustion piping for restriction (non-warranty).
a. Low spots.
b. Crushes and kinks.
3. Inspect and or replace fuel filter on inlet side of fuel pump, see page 32 (maintenance).
4. Check fuel pump operation.
a. Pump should tick, if so continue to step 5 if not continue below.
b. Install test pump, clear codes and run unit.
PLEASE NOTE!
You cannot probe the fuel pump plug for voltage - this sets a Code 48 and prevents the unit from running.
c. If problem is resolved install pump, clear codes, run unit and restart troubles shooting. Otherwise continue below.
d. Troubleshoot wiring from pump to harness (non-warranty).
e. If wiring is damaged repair as needed using heat shrink & solder butt connectors.
15
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
5. Check fuel supply/measure fuel quantity.
a. Disconnect the fuel line from heater
b. Turn the unit on (remember 60 second delay prior to pump activation)
c. Place the fuel line into the graduated cylinder and allow to run through a first start attempt.
d. Once fuel pump stops running from first start attempt turn the unit off.
e. The measured fuel must be between 8.5 to 9.5 milliliters.
f. If the reading is high and the pump angle is verified correct, replace the pump, clear the codes, run the unit, and restart troubleshooting.
g. If the reading is low and the pump angle is verified correct, replace inlet screen and retest.
h. Inspect all fuel line connections to see if the lines have a crisp cut on the end. Inspect fuel pick-up pipe for any obstructions.
Figure 16
Bubble
Right
Wrong
Correct
Wrong
i. If no fault is found on the inlet line or pick-up pipe operate the fuel quantity test from an external fuel source.
j. If results are still low replace pump.
6. Replace atomizing screen, clean starting air hole (maintenance) and inspect glow pin.
a. If pin visibly deteriorated replace it, clear codes and restart troubleshooting.
7. Check flame sensor resistance, see pages 19 & 23.
8. Remove and inspect the burner chamber (see pictures in the Basic Repair Analysis guide).
a. If burner chamber has carbon build up replace the burner chamber
1. Soft carbon: (non-warranty).
a.
Is an indication of over fueling (FMP angle).
b. Restricted exhaust.
c.
Restricted intake.
d. Plugged blower wheel.
2. Hard carbon: (non-warranty)
a.
Is an indication of too much additives.
b. Heavy concentration of bio-fuel.
c.
Short cycle of heater (recommended minimum runtime is 15 minutes).
d. Road debris (reposition combustion air intake to a location not to pick-up debris).
e.
Clear codes and run unit.
053 - Flame loss during start
1. See Code 52
054 - Flame cutout in boost mode
1. Heater has started successfully but the flame has extinguished.
2. Inspect and or replace fuel filter on inlet side of fuel pump, see page 32. (maintenance).
3. Inspect for possible air entry into the suction side of the fuel system.
4. Check fuel supply/measure fuel quantity.
a. Disconnect the fuel line from the heater.
b. Turn the unit on (remember the 60 second delay prior to pump activation).
c. Place the fuel line into the graduated cylinder and allow to run through a first start attempt.
d. Once the fuel pump stops running from the first start attempt turn the unit off.
e. The measured fuel must be between 8.5 to 9.5 milliliters.
f. If the reading is high and the pump angle is verified correct (15-35), replace the pump, clear the codes, run the unit, and restart troubleshooting.
g. If the reading is low and the pump angle is verified correct, replace inlet screen and retest.
h. Inspect all fuel line connections to see if the lines have a crisp cut on the end (Figure 13). Inspect fuel pick-up pipe for any obstructions.
Figure 16
Bubble
Right
Wrong
Correct
i. If not fault is found on the inlet line and pick-up pipe operate the fuel quantity test from an external fuel source.
16
Wrong
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
5. Check exhaust and combustion air intake lines (maintenance)
a. Low spots
b. Crushed and kinked areas
c. At least a 45 degree downward angle in exhaust piping
6. Test flame detector, see page 20.
056 - Flame cutout in low mode
1. See Code 054
057 - Flame cutout during start phase .
1. Unit is seeing sensed heat prior to fuel pump engagement- Often flooded chamber due to fuel supply issues.
2. Check fuel supply/measure fuel quantity.
a. Disconnect the fuel line from heater.
b. Turn the unit on (remember 60 second delay prior to pump activation).
c. Place the fuel line into the graduated cylinder and allow to run through a first start attempt.
d. Once fuel pump stops running from first start attempt turn the unit off.
e. Measured fuel must be between 3.5 to 4.3 milliliters.
f. If the reading is high and the pump angle is verified correct, replace the pump, clear the codes, and run the unit, and restart troubleshooting.
g. If the reading is low, replace the fuel filter located on the inlet side of the pump and re-run quantity test otherwise clear codes and restart
troubleshooting.
h. If results remain low after servicing the fuel filter, replace the fuel pump and re-run quantity test -otherwise clear the codes and restart troubleshooting.
i. If, after steps G & H, the results are still low check the fuel stand pipe for obstructions - otherwise clear codes and restart troubleshooting.
3. Check exhaust and combustion lines.
a. Low spots
b. Crushed and kinked areas
c. At least a 45 degree downward angle in exhaust piping extended 1.5” to 2.5” past rear of cab.
4. Using shop air, blow out the heat exchanger and airflow ducting including the intake.
5. Remove the sensor, check connections, wire and reinstall.
6. If the wiring is damaged or connection is corroded, replace the sensor, otherwise continue below.
7. Install test sensor, clear codes and run unit.
8. If problem is resolved leave sensor in and restart troubleshooting.
9. If problem persists install test control unit, clear codes and run unit.
10.If problem is resolved install old sensor, leave in control unit, clear codes and restart troubleshooting.
If problem persists contact tech support at 800-387-4800.
PLEASE NOTE!
Before beginning any troubleshooting review pages 6-7 and ensure the visual checklist has been completed.
060 - Open circuit - external temperature sensor (Digi / Digi-Max Controllers only) .
1. Temperature sensor detects a value beyond its range.
2. Replace Digi-Controller.
061 - Short circuit - external temperature (Digi / Digi-Max Controllers only) .
1. Temperature sensor detects a value beyond its range.
2. Replace Digi-Controller.
062 - THERMOSTAT / RHEOSTAT TIMER, OPEN CIRCUIT
1. Fault reader connected prior to turning on temp controller or faulty temp controller.
2. Clear code and run unit.
3. If problem persists inspect control unit wire harness for damage or loose connection and repair if needed (solder but connectors & use heat shrink).
4. If problem persists replace Digi-Controller or Mini-Controller.
5. If problem persists install test ECU.
6. If problem is resolved leave in test ECU, clear codes and restart troubleshooting.
If problem persists contact tech support 800-387-4800.
063 - SWITCH CONTROL - SHORT CIRCUIT
1. If a ventilating switch has been built in, disconnect and check function. If faulty, replace switch.
2. Disconnect wires from thermostat or switch. If fault Code 062 is displayed, replace switch.
3. If switch is O.K., check connection of grey/red wire and brown/white wire for short-circuit.
4. If O.K., reconnect wires to thermostat/control. Disconnect connection B1 (16 pin connector on vehicle of harness). If fault Code 063 is still displayed,
replace control unit.
17
4 Fault Code / Troubleshooting
REVISION LEVEL A - 12/09/13
064 - OPEN CIRCUIT - FLAME SENSOR
1. Open Airtronic shell and remove ECU from casing. Install test sensor, clear codes and run unit.
2. If problem is resolved leave sensor in and restart troubleshooting.
3. If problem persists install test ECU, clear codes and run unit.
4. If problem is resolved install old sensor, leave in ECU, clear codes and restart troubleshooting.
If problem persists contact tech support at 800-387-4800.
065 - SHORT CIRCUIT - FLAME SENSOR
1. Open Airtronic shell and remove ECU from casing.
2. Disconnect green connector from ECU. If fault Code 064 is displayed, replace combination sensor (flame/temperature).
3. If fault Code 065 is still displayed, replace ECU.
071 - OPEN CIRCUIT - OVERHEAT SENSOR
1. Open Airtronic shell and remove ECU from casing. Install test sensor, clear codes and run unit.
2. If problem is resolved leave sensor in and restart troubleshooting.
3. If problem persists install test ECU, clear codes and run unit.
4. If problem is resolved install old sensor, leave in ECU, clear codes and restart troubleshooting.
If problem persists contact tech support at 800-387-4800.
072 - SHORT CIRCUIT - OVERHEAT SENSOR
1. Open Airtronic shell and remove ECU from casing.
2. Disconnect blue connector from control unit.
3. If fault Code 071 displayed, replace combination sensor (flame/temperature).
4. If fault Code 072 is still displayed, replace control unit.
074 - CONTROL BOX DEFECT
1. Overheating threshold value is not detected by ECU, replace ECU.
090 - CONTROL UNIT DEFECTIVE **
091 - EXTERNAL VOLTAGE DISTURBANCE ** (MAINTENANCE)
1. Check vehicle charging system. Poor battery, battery charger, eliminate fault.
092 - 103 - CONTROL UNIT DEFECTIVE **
** Disconnect heater from power for 10 seconds by disconnecting the 14 pin connector at the heater or pull the 20 amp fuse. Reconnect and test again. If the
problem persists, test the heater using an external power source other than the vehicle (known good battery only). These faults are common to a bad power
supply, attached charger or dead cell in a battery.
If problem persists install test control unit, clear codes and run unit.
Contact tech support at 1-800-387-4800.
18
5 Service Information
REVISION LEVEL A - 12/09/13
FUEL QUANTITY TEST
The fuel quantity should be tested if the heater has difficulty starting or
maintaining a flame.
PREPARATION
• Detach the fuel line from the AIRTRONIC.
• Insert the fuel line into a graduated cylinder 10ml.
• Switch the AIRTRONIC on. Once the FMP comes on allow the fuel system
to bleed air out for approximately 60 seconds.
• Switch the AIRTRONIC off and empty the graduated cylinder.
MEASUREMENT
• Switch the AIRTRONIC on.
• The fuel is pumped approx. 60 seconds after switching on.
• Hold the fuel line in the graduated cylinder level with the glow pin while
fuel is being delivered.
• The pump will stop automatically after delivering fuel for 90 seconds
(110 seconds for AIRTRONIC 4).
• Once fuel pump stops, switch off the heater.
EVALUATION
• Read out the quantity of fuel in measuring glass.
• Fuel quantity should be between:
3.5 ml and 4.3 ml. on AIRTRONIC D2
5.0 ml and 6.0 ml. on AIRTRONIC D4
6.8 ml and 7.6 ml. on AIRTRONIC B4
• Replace the fuel metering pump if the fuel quantity is above specified
value.
If measured fuel quantity is insufficient:
– Check the filter in the fuel pump.
– Check that the fuel lines are correctly routed.
– Check that the fuel lines don’t leak.
– Check and tighten hose connections.
– Does fuel withdrawal comply with the data in the technical description.
PLEASE NOTE!
The fuel quantity is not affected by voltage variances.
Figure 17
1
4
3
2
Espar part #: 552 00 04
Graduated Cylinder 10ml
VALUES FOR OVERHEAT SENSOR
2000
1800
Resistance (kOhm)
1600
1200
1000
800
600
400
200
0
-40 -20
0
20
Figure 18
40
60
80 100 120 140 200
Temperature (°C)
Temperature °C (F°)
-40 (-40)
-20 (-4)
0 (32)
20 (68)
40 (104)
60 (140)
80 (176)
100 (212)
120 (248)
140 (284)
160 (320)
180 (356)
200 (392)
Resistance kΩ
min.
1597.0
458.80
154.70
59.30
25.02
11.56
5.782
3.095
1.757
1.050
0.6654
0.4253
0.2857
max.
1913.0
533.40
175.50
65.84
28.04
13.16
6.678
3.623
2.081
1.256
0.792
0.5187
0.3513
Temperature °C (F°)
-40
-20
0
20
40
60
80
100
120
140
160
Resistance Ω
842.7
921.6
1000.0
1077.9
1155.4
1232.4
1308.9
1385.1
1460.7
1535.8
1610.5
min.
825.9
803.2
980.0
1056.4
1132.3
1207.8
1282.8
1357.4
1431.5
1505.1
1578.3
max.
859.6
940.0
1020.0
1099.5
1178.5
1257.1
1335.1
1412.8
1489.9
1566.6
1642.8
VALUES FOR FLAME SENSOR
2400
2200
Resistance (kOhm)
2000
1800
1600
1400
1200
1000
800
-40
Figure 19
0
50
100 150 200
Temperature (°C)
250
300
350
19
5 Service Information
REVISION LEVEL A - 12/09/13
CONTROL VALUES
MOTOR SPEED
Test speed for the blower heater
AIRTRONIC D2 / D2 Camper
12 volt heater
5000 rpm ±25 %
at U = 10.0 volt
AIRTRONIC D2
24 volt heater
at U = 18.0 volt
5000 rpm ±25 %
AIRTRONIC M B4 / D4 / D3 Camper / D4 Camper
12 volt heater
4400 rpm ±25 %
at U = 10.0 volt
AIRTRONIC M D4
24 volt heater
4400 rpm ±25 %
at U = 18.5 volt
AIRTRONIC M D4S / D4 Camper plus
12 volt heater
4400 rpm ±25 %
at U = 10.5 volt
AIRTRONIC M D4S
24 volt heater
4400 rpm ±25 %
at U = 19.0 volt
CONTROL STAGE D2 D4
• Power
• Fast
• Medium
• Slow
• Adjustment
- in circulation mode with temperature sensor, internal
- In fresh air mode with temperature sensor, external
• Ventilation
RESISTANCE VALUES
COMPONENT
Glow pin
Fuel metering pump
Operator control unit
Set value potentiometer
600 U/min ± 20 rpm
0 rpm
4800 U/min ± 140 rpm
600 U/min ± 20 rpm
0 rpm
4400 U/min ± 100 rpm
AIRTRONIC D2- 24V
1.2 - 2.0 Ω
36 ± 1.8 Ω
1750 - 2180 ± 80 Ω
1750 - 2180 ± 80 Ω
COMPONENT
Overheating sensor
EXHAUST VALUE
CO2 in exhaust in control stage “high”
20
AIRTRONIC
D4
4400 U/min ± 130 rpm
3500 U/min ± 100 rpm
2600 U/min ± 80 rpm
1600 U/min ± 50 rpm
AIRTRONIC D2- 12V
0.42 - 0.7 Ω
9.5 ± 0.5 Ω
SWITCH VALUE
Soot number as per Bacharach
AIRTRONIC
D2
4800 U/min ± 140 rpm
4000 U/min ± 120 rpm
2800 U/min ± 80 rpm
2000 U/min ± 60 rpm
AIRTRONIC D2 / D4
140°C - 170°C
(284°F - 338°F)
measured in the control
stage “power” and at a
clearance of 300 mm
from the hot air outlet
AIRTRONIC D2 / D4
7.5 -12.5 Vol. %
<4
Overheat ~60KOhm at room temp
Flame sensor ~1.0KOhm at room temp
300 mm
Figure 20
5 Service Information
REVISION LEVEL A - 12/09/13
PLEASE NOTE! Remove power from the heater prior to any disassembly
by unplugging main connection or removing main fuse.
If gasket was removed during disassembly, replace it when
reassembling.
Clean all parts before reassembly and check for any signs of
damage, replace where necessary.
REPAIR INSTRUCTIONS
Removing the cover
Removing and checking the control unit
Removing the glow pin
Removing the lining
Removing and checking the overheat and flame sensor
Installing the overheat and flame sensor
Dismantling the heat exchanger
Removing the combustion air blower
Removing the combustion chamber
PLEASE NOTE! The cover must always be removed from the AIRTRONIC for
all repair stages. You may have to wait for the device to cool
down.
Figure 21
REMOVING THE COVER FROM THE AIRTRONIC
Unlock both seal plates, lift cover and pull to the front.
The cable harness can exit from the left or right of heater shell.
a
1
2
b
Cover a
Seal Plates b
REMOVING THE CONTROL UNIT
Remove the AIRTRONIC cover.
Unscrew fastening screw, press retaining brackets together, lift out ECU. Unclip
the lines from the holder of the control unit (observe the positions of the lines).
Remove the bushing (lower part) from the outer case. Disconnect the control
unit from the controller. The ECU can now be removed.
b
c
a
Figure 22
PLEASE NOTE! When reassembling the ECU, ensure that the lines are
correctly clipped in the holder of the ECU, and that the
connectors are plugged into the ECU (non-interchangeable).
Fastening screw a
Retaining brackets b
ECU c
Bushing d
b
21
5 Service Information
REVISION LEVEL A - 12/09/13
RECOMMENDED PERIODIC MAINTENANCE
• Remove the AIRTRONIC cover.
• Remove the ECU.
c
Figure 23
Figure 24
b
Disconnect the connector of the glow pin cable harness from
the ECU.
Remove the rubber grommet and use the special tool to unscrew
the glow pin.
The special tool is included with the glow pin.*
Tighten torque of the glow pin: 6 +0.5 Nm (50 in•lb)
PLEASE NOTE! Please check product catalogue for more information.
PLEASE NOTE! When the glow pin has been removed, check the screen of
the support in installed state for any contamination.
The screen must be replaced if the surface is covered with
carbon.
REMOVING THE SCREEN
Glow pin a
Connector of glow pin cable harness b
Rubber bushing c
Pull the screen out of the support with pointed pliers. Blow out the support
with compressed air.
If necessary, carefully pierce with a wire.
a
The special tool has to be used to install the screen. The special tool is
included with the screen. Push the screen onto the special tool, watching the
position of the recess. The recess must be positioned at right angles (90°) to
the axis of the heater.
a
c
Newer screens do not have a recess.
90°
Push the tool with the screen carefully as far as it will go, ensuring that the
bore (ø 2.7 mm) for the glow plug ventilation is free. See illustration 1.
In case of the shorter, new style screen (see image B) the position of the
screen to the vent hole has no reference. Ensure installation tool is completely
seated when installing screen.
Image A
Figure 25
b
aScreen
bBore (Ø 2.7 mm) for glow pin ventilation
cVent Hole (Can be cleaned with wire)
Allow riveted section to be placed in such a way as to not
block the vent more.
Figure 26
Image B
a
a
b
b
Figure 28
Figure 27
aSpecial tool
bPosition of recess
22
aSpecial tool
bScreen
5 Service Information
REVISION LEVEL A - 12/09/13
REMOVING THE OVERHEAT SENSOR / FLAME SENSOR
Figure 30
• Remove the AIRTRONIC cover.
• Remove the control unit.
b
Disconnect both connectors of the overheating / flame sensor cable harness
from the ECU.
Unlock clip from sensor.
Remove overheat /flame sensor.
OVERHEAT SENSOR
Check the overheat sensor with a digital multimeter. If the resistance value is
outside the set point indicated in the values, on pg. 26 then the sensor must
be replaced.
FLAME SENSOR
Check the flame sensor with a digital multimeter. If the resistance value is
outside the set point indicated by the values table on pg. 26, then the sensor
must be replaced.
a
aCable harness for overheat/flame sensor
bclip
b
INSTALLING THE OVERHEAT SENSOR / FLAME SENSOR
a
For AIRTRONIC D2 (Assembly using purpose made tool) mount the special tool
on the sensor.
Place the sensor on the heat exchanger using the special tool.
The special tool slides on the heat exchanger until the sensor meets the collar
(installation site of the sensor).
Lock the sensor in place and remove the purpose made tool.
It is then vital to check that the sensor sits flat on the heat exchanger. If
necessary use a mirror and lamp to aid correct assembly.
Route the cable harness sensor along the clip eyelet to the control unit and
connect.
Connector blue
Figure 31
a Special tool - only for AIRTRONIC D2
b Overheat sensor / flame sensor
Figure 32
b
bl
Connector green
br / ws
gn
a
1=overheating sensor
2=flame sensor
a Special tool - only for AIRTRONIC D2
b Overheat sensor / flame sensor
Figure 33
c
b
a
Figure 29
a Clip
b Overheat sensor / flame sensor
a Clip
b Cable harness - overheat/ flame sensor
c Special tool - only necessary for the AIRTRONIC D2
23
5 Service Information
REVISION LEVEL A - 12/09/13
DISMANTLING THE HEAT EXCHANGER
REMOVING THE COMBUSTION AIR BLOWER
• Remove the AIRTRONIC cover.
• Remove the ECU.
Remove the gasket.
Take the AIRTRONIC out of the outer case (lower part).
Unscrew the 4 fastening screws from the combustion air blower.
Remove the combustion air blower and the seal from the heat exchanger.
PLEASE NOTE! When reassembling the combustion air blower, a new
gasket is always required.
c
b
a
Tighten the 4 fastening screws of the combustion air blower in the series
shown in the drawing, with a tightening torque of 4 +0.5 Nm. (35 in•lb)
Figure 34
a Combustion Air blower
b Heat Exchanger
c Fastening screws
Figure 35
5
2
4
3
1
1-4
5
24
Tighten the fastening screws in this sequence with a tightening
torque of 4 +0.5 Nm (35in•lb)
Always replace the seal between combustion air blower and heat
exchanger.
5 Service Information
REVISION LEVEL A - 12/09/13
REMOVING THE COMBUSTION CHAMBER
b
• Remove the AIRTRONIC cover.
Remove the flange seal.
Take the AIRTRONIC out of the outer case (lower part).
• Remove ECU (see previous pages).
• Remove glow pin (see previous pages).
• Remove combustion air blower (see previous pages).
a
Unscrew the fastening screws.
For AIRTRONIC D2 = 3 fastening screws
For AIRTRONIC D4 = 4 fastening screws
Pull the combustion burner out to the front and remove the
burner’s thermal insulator from the heat exchanger.
PLEASE NOTE! When reassembling the combustion burner, the thermal
insulator, must always be replaced.
Tighten the self tapping fastening screws of the combustion chamber with a
torque of 5 +0.5 Nm. (44 in•lb)
PLEASE NOTE! If the heat exchanger is being replaced, the overheat/flame
sensor must be dismantled and mounted to the new heat
exchanger (see previous pages).
c
Figure 36
a Combustion burner
b Heat Exchanger
c Fastening screws
AIRTRONIC D2 = 3 fastening screws
AIRTRONIC D4 = 4 fastening screws
Figure 37
3
2
1
4
PLEASE NOTE! Holes in heat exchanger that fasten the burner tube are
not tapped.
When fastening a burner to a new heat exchanger it is
recommended to use new screws.
1 Combustion burner
2 Thermal insulator between combustion burner and heat exchanger, must
always be replaced if burner is removed from the heat exchanger.
(Holes not threaded)
3 Heat exchanger
4 Self tapping fastening screws.
AIRTRONIC D2 = 3 fastening screws
AIRTRONIC D4 = 4 fastening screws
25
6 Parts Breakdown
REVISION LEVEL A - 12/09/13
AIRTRONIC D2 / /D3 / B /D4
SERVICE PARTS DIAGRAM
17
20*
11
16
15
18
1
10
9
3
2
5*
4
8
6
12
7
13
19
14
26
AIRTRONIC D2 / B / D4
DESCRIPTION & PART #’S
Ref . No . Description
1
Heat exchanger
2
Burner
3
Thermal insulator for burner
4
5
Grommet
Fillister head bolt, M 5 x 12 (3 required)
Fillister head bolt, M 5 x 12 (4 required)
Blower motor
6
7
8
Fillister head bolt, M 5 x 25
Gasket, blower
9
Control unit
10
11
Fillister head bolt, M 4 x 10
Upper casing
12
Lower casing
13
14
15
16
Grommet
Flange seal
Overheat sensor / Flame sensor with tool
Clip
17
Glow pin with socket wrench
18
19
20
Glow pin screen with tool
Mounting plate with hardware and seal
Glow pin wrench *
Part Number
Model #
20 1812 05 12V
25 2069 05 12V
25 2070 05 24V
25 2326 05 12V
25 2327 05 12V
25 2113 05 12V
25 2114 05 24V
25 2144 05 12V
6 Parts Breakdown
25 2069 06 01 00
25 2113 06 01 00
25 2069 10 01 00
25 2113 10 01 00
20 1812 10 01 00
25 2069 06 00 01
25 2113 06 00 01
25 2069 06 00 02
103 10 348
103 10 348
12V 25 2069 99 20 00
24V 25 2070 99 20 00
12V 25 2113 99 20 00
24V 25 2114 99 20 00
12V 25 2144 99 20 00
Locally available hardware
25 2069 01 00 03
25 2113 01 00 03
24V 22 5102 00 10 01
12V 22 5101 00 10 05
24V 22 5102 00 10 03
12V 22 5101 00 10 06
12V 22 5101 00 10 13
12V 22 5101 00 10 14
Hella 12V 22 5101 00 30 01
Hella 12V 22 5101 00 30 05
22 5101 00 30 15
103 10 349
25 2069 01 06 00
25 2113 01 00 01
25 2069 01 01 00
25 2113 01 01 00
25 2069 01 00 01
25 2069 01 00 02
25 2069 01 02 00
25 2069 01 02 02
25 2113 01 02 02
12V 25 2069 01 13 00
24V 25 2070 01 11 00
25 2069 10 01 02
5540001
25 2069 01 03 03
•
• •
•
• •
•
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
•
•
•
• •
•
•
•
• •
• •
• •
•
•
•
•
•
• •
•
•
• •
• •
• •
• •
• •
• •
• •
•
•
•
•
•
•
•
•
•
• •
•
•
•
•
• •
• •
• •
•
•
• •
• •
• •
• •
• •
• •
• •
• •
• •
• •
•
•
•
•
•
•
•
•
• •
•
•
•
•
•
•
•
•
•
•
• •
• •
• •
•
•
•
•
• •
•
•
• •
• •
• •
•
•
•
•
• •
• •
• •
• •
• •
* This tool is designed for occasional usage. If heavy use is anticipated, more appropriate tools are available from tool manufacturers.
Recommended: Snap-On Flare nut socket 12mm Stock # FRXM12
27
6 Parts Breakdown
REVISION LEVEL A - 12/09/13
AIRTRONIC D2 / D3 / B / D4
SERVICE PARTS DIAGRAM
3
2
4
29
3
2a
41
5
30
42
22
1
22
21
22
18
31
24
9
10
25
27
32
18
36
20
33
8
26
11
6
44
7
35
43
45
19
40
20
18
10
28
17
34
18
46
16
12
23
14
13
15
37
17
17
39
38
47
16
48
28
AIRTRONIC D2 / B / D4
DESCRIPTION & PART #’S
Ref . No . Description
1
2
2a
3
4
5
6
Safety screen
Warm air deflector
Clamp
Flexible air hose
Straight outlet hood
7
8
9
10
11
12
Main harness
Short harness
Cable ties (197mm)
Air intake (1 meter)
Flexible exhaust (1 meter)
Fuel hose - rubber 3.5 mm
Plastic fuel line 1.5 mm
Fuel metering pump
13
14
15
16
17
18
19
20
21
22
23
24
Clamp for fuel metering pump
Plastic fuel line - black
Angle bracket
Fuel hose - rubber 5 mm
Clamp
Clamp
End sleeve with cross bar - 25mm plastic
Grommet
Intake hose clamp
Clamp
Fuel screen
Blade fuse
25
26
*27
28
*29
*30
31
Plug connector - Kit
Housing - Kit female
Muffler
Connectors for fuel metering pump - Kit
90° Air outlet hood
90° Bend
Fuse holder with terminals
Part Number
ø 60
ø 75
ø 60
ø 90
ø75
ø 50-70
ø 70-90
ø 60
ø 90
ø 75
ø 60
ø 90
ø 75
25 1688 80 06 00
25 1552 05 01 00
20 2800 50 02 00
20 1609 80 09 00
22 1050 89 21 00
5550004
5550003
10 2114 31 00 00
10 2114 37 00 00
10 2114 34 00 00
22 1000 01 00 16
22 1000 01 00 19
22 1000 01 00 18
20 2900 70 03 91
20 2900 70 02 05
5590003
ø25 mm
360 00 006
ø24 mm
25 1774 80 02 00
360 75 300
890 31 125
12V
22 4519 01 00 00
24V
22 4518 01 00 00
22 1000 50 03 00
2 mm
890 31 125
20 2900 40 0104
360 75 350
11 mm
10 2068 01 10 98
9 mm
10 2068 00 90 98
25 1729 89 00 02
20 1280 09 01 03
ø 20-32
10 2065 02 00 32
26 mm
152 61 102
20 1312 00 00 06
20 amp
5670055
10 amp
5670056
22 1000 31 80 00
22 1000 31 81 00
25 1864 81 01 00
22 1000 31 87 00
ø 60
22 1000 01 00 20
ø 75
22 1000 01 00 22
ø 90
22 1000 01 00 23
ø 60
25 1688 89 00 01
ø 75
25 1482 89 00 05
5670051
Model #
20 1812 05 12V
25 2069 05 12V
25 2070 05 24V
25 2326 05 12V
25 2327 05 12V
25 2113 05 12V
25 2114 05 24V
25 2144 05 12V
6 Parts Breakdown
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29
AIRTRONIC D2 / B / D4
DESCRIPTION & PART #’S
Ref . No . Description
32
33
*34
35
*36
37
* 38
* 38a
39
40
41
42
43
44
45
46
47
48
Terminals
3/8’ Ring terminals 10-12 G
7 day timer
Thermostat
Operating switch (rotary)
Standard fuel pick up pipe
Fuel pick up pipe (Compression fitting type)
Compression fittings
P-clamp w/Lining
P-clamp
P-clamp
End-sleeve 24 mm
Bezel kit for 7 day timer
Mini Controller
Digi Controller
Ext Temp Sensor
Fault code retrieval device
Digi-Max Controller
* = indicates optional features
30
Part Number
5670199
5670178
22 1000 30 40 00
12V
24V
12V
24V
2 mm
1/4” NPT
3/8” NPT
1/2” NPT
10 mm
25 mm
28 mm
301 00 154
301 00 153
25 1895 71 00 00
25 1896 71 00 00
20 2900 20 20 56
20 2900 20 20 42
20 2900 20 20 44
5520002
5520006
152 00 139
152 10 048
152 10 051
25 1482 80 00 01
25 1482 70 01 00
22 1000 32 07 00
20 2800 70 10 00
25 1774 89 03 00
20 2900 70 50 20
20 2800 70 15 00
Model #
20 1812 05 12V
25 2069 05 12V
25 2070 05 24V
25 2326 05 12V
25 2327 05 12V
25 2113 05 12V
25 2114 05 24V
25 2144 05 12V
6 Parts Breakdown
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7 Carboning
REVISION LEVEL A - 12/09/13
EXAMPLES / CAUSES OF CARBONING
Carbon is a term used to classify debris in the burner chamber . What
you may visually see may not be carbon but still needs to be addressed
properly to resolve the root cause of the issue . This is just a guide to the
more common things you may encounter .
1. AIR FUEL MIXTURE
a. If the air fuel mixture is off it can cause a black soot in the burner
chamber and can also be identified by looking though the heater exhaust
exhaust port.
i. Improper angle of fuel pump.
ii. Wrong fuel pump used.
iii.Fuel pump out of calibration, perform fuel quantity test found on page 13.
iv. Low spots or restriction of intake tube or exhaust tube.
v. Debris ingested into the combustion air intake fan impeller.
vi.Improper length or too many bends of intake and exhaust tube
Combined maximum of 6 .5’ and 270° of bends .
3. SHORT CYCLING OF HEATER
a. If the heater is allowed to short cycle it may cause a build-up of
Creosote. Minimum runtime on a heater should be 15 minutes.
b. Sizing of the heater is important: If it is sized too large or cycled off at
too low of a coolant temperature could lead to premature burner
chamber failures.
c. Electrical connection issues: If the signal wire is sporadic, it will turn
the heater on and off.
d. Abrupt loss of main power: Can cause burner chamber failure due to
loss of its cool down cycle – never use the Master Disconnect Switch to
cut heater power.
Figure 40
Figure 38
2. NON-FUEL RELATED BUILDUP
a. If all the steps have been covered under the section outlining code 52
and the chamber is clean looking the issue may be in the fuel or
chemicals ingested by the intake tube.
i. If the heater intake tube is in a location to pick up road debris like water
and salt it can build up in the burner matting.
ii. Additives are OK to use but if the concentration is in excess of the
manufactures recommendations, it can build up in the burner matting.
iii. Oil related products like ATF or used oil will cause premature chamber failure.
This practice will not be tolerated by the heater. If oil must be used it is
recommended to operate your Espar heater from a separate fuel source.
Figure 39
31
7 Fuel Filter / Fuel Pump angle
REVISION LEVEL A - 12/09/13
FUEL PUMP MAINTENANCE / PROPER MOUNTING
Figure 41
Fuel pump inlet filter
FMP and bracket assembly
Figure 42
Fuel pump inlet filter – clean or replace annually, more frequently if fuel
contamination is noticed. Fuel pump should be mounted at a 15-35 degree
angle, harness connection / outlet side facing up.
32
Espar Products, Inc.
(800) 387-4800
(905) 670-0960
www.espar.com
AIRTRONIC D2/D4 DIAGNOSTICS & REPAIR MANUAL
www.espar.com
Version 12/2013 Subject to change without notice.